The lungs primary function is to get oxygen into the blood, so that it can be delivered to the cells, and remove the carbon dioxide from the body. The stronger the lungs and the more gas they can hold the better there ability is to distribute and dispose of the two gases.
There is an easy test that can be performed without expensive or high tech equipment. All that is required is a bucket of water, a balloon and a pen.
| Height | Results | ||||
|---|---|---|---|---|---|
| Poor | Fair | Average | Good | Excellent | |
| Under 5’6” | < 3 | 3 – 4 | 4 – 5 | 5 – 6 | > 6 |
| Over 5’6” | < 4 | 4 – 5 | 5 – 6 | 6 – 7 | > 7 |
To improve upon the results in this test some form of cardio-vascular exercise should be undertaken. Smoking does not help achieve a good result either.